<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>css光晕效果</title>
  <style>
  body{
    background: rgb(2, 11, 63);
  } 
  p{
    text-shadow: #ddd 0px 0px 20px;
    color: #fff;
    font-size: 20px;
  }
  </style>
</head>
<body>
  <div> 
    <p>光晕效果</p>
  </div>
  
</body>
</html>